Operators & Expressions - Concepts
Explore the key concepts of operators & expressions with practical examples and exercises.
Module Overview & Professional Context
This module builds on foundational concepts to explore more advanced and practical programming techniques that professional developers use daily. Mastering these patterns is essential for writing code that is not only correct but also maintainable, scalable, and performant in production environments. Every concept covered in this module appears consistently in technical interviews, peer code reviews, and daily software engineering at companies ranging from early-stage startups to global technology enterprises like Google, Amazon, and Microsoft. The ability to apply these concepts fluently — without pausing to recall the basics — distinguishes a developer who is immediately productive from one who requires extensive onboarding. Study the examples carefully, paying attention not just to what the code does but to why it is structured the way it is. Each design decision encodes knowledge distilled from decades of software engineering experience. Understanding the reasoning makes the patterns memorable and generalisable to novel problems encountered throughout a career. Real-world software projects combine multiple concepts simultaneously. The topics in this module are not isolated exercises — they interact with and build upon each other and upon concepts from adjacent modules. As you work through the exercises, notice these connections. Recognise when a technique from a previous module enables a cleaner solution here. This kind of cross-concept synthesis is the hallmark of experienced engineering thinking and is precisely what code reviewers and technical interviewers evaluate in follow-up questions. By the time you complete this module you will have the conceptual foundation and practical vocabulary to discuss these topics fluently in professional settings. You will be able to read and contribute to production codebases using these patterns, articulate trade-offs clearly in technical discussions, and adapt the patterns to fit new requirements — the three most essential skills of a professional software developer working in any technology stack.
Introduction to Operators & Expressions
In this section, we cover the fundamental aspects of operators & expressions. You'll learn core concepts, see real-world examples, and understand how to apply them in your projects.
Key Concepts
- Understanding the core principles of operators & expressions
- Practical applications and real-world use cases
- Step-by-step implementation guides
- Common patterns and best practices
- Tips for debugging and troubleshooting
- Performance optimization techniques
Operators & Expressions - Code Example
#include <stdio.h>
int main() {
int a = 10, b = 3;
printf("Add: %d\n", a + b);
printf("Sub: %d\n", a - b);
printf("Mul: %d\n", a * b);
printf("Div: %d\n", a / b);
printf("Mod: %d\n", a % b);
// Bitwise
printf("AND: %d\n", a & b);
printf("OR: %d\n", a | b);
printf("XOR: %d\n", a ^ b);
printf("Left shift: %d\n", a << 1);
return 0;
}